While Facebook for Android may have more absolute users than its iPhone counterpart, the iPhone has a much better penetration rate. Facebook’s native app is actively used by 73.6% of the estimated 200 million iPhone install base. Only 35% of the estimated 550M Android install base see monthly usage of Facebook’s native app. This may be in part due to the popularity of Android in China where Facebook is blocked. However, it may also show Facebook’s lagging penetration in emerging markets like India where Androids are common.